time-dependent cp violation in decays
DESCRIPTION
Time-dependent CP violation in decays. Kang Young Lee (KAIST, Daejeon). @KIAS 2005. 10. 10. Outline. Introduction Mixing-induced CP violation in decay Anomalous right-handed couplings SUSY contributions Summary. Introduction. CP violation in B decays - PowerPoint PPT PresentationTRANSCRIPT
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Time-dependent CP violation in
decays
Kang Young Lee(KAIST, Daejeon)
@KIAS 2005. 10. 10.
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Outline
Introduction Mixing-induced CP violation in
decay Anomalous right-handed couplings SUSY contributions Summary
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Introduction CP violation in B decays
The SM source : CKM element
measurement in decay : agrees well with the SM prediction tree-level decay NP effect in decay is ignored mixing-induced CP violation
decays : penguin-mediated decays do not carry CP phase in the leading order sensitive to new physics effects discrepancy with the SM prediction?
2sin SKJB /
tdV
sssb
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Nie
rste
LP
2005
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Nierste LP 2005
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decays : Cabibbo-suppressed decays involves and provides decay CP violation present experimental bound
Belle LP 2005 Inclusive decay is hardly discriminated from lar
ge background. Charged decay suffers from large long-distanc
e effect due to annihilation.
Time-dependent CP asymmetry in decay
tdV
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Mixing-induced CP violation in decay
Effective Hamiltonian
where
Wilson coefficient at
with
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Amplitudes w.r.t. the final state photon polarization
with
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CP asymmetry
where
The parameter is defined by
In the SM,
,
bd mmCC // 7'7
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We define
We rewrite the coefficient as
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Anomalous right-handed couplingsK.Y. Lee, to appear in PLB
The effective lagrangian
where measures the NP effect. Effects of right-handed couplings
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Numerical Analysis
Constraints
Results
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is assumed
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SUSY contributionsC.S.Kim, Y.G.Kim, K.Y.Lee, PRD 71, 054014 (2005)
The Wilson coefficients after RG running is given by
where the SUSY contribution is given by
Buras et al., NPB 566, 3 (2000), S. Baek et al., NPB 609, 442 (2001)
The mass insertion is defined by
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Summary
decay is interesting for the study of CP violation because it involves the decay CP violation.
Time-dependent CP violation in decay is suppressed by due to the chiral operators.
Sizable CP violation requires the sizable chiral operator and .
Anomalous right-handed and couplings and SUSY can provide substantial CP violation.